Pump



A. BOULADE.

PUMP.

INVENTOR 3 SHEETS-SHEET l. my 5.

Patented May 18, 1920.

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PUMP.

APPLICATION FILED ocT. I9, IsIs.

1,340,596, Patented May 18, 1920.

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INVENTon Al BOULADE.

PUMP.

APPLICATION FILED OCT. I9, 1918.

Patented May 18, 1920.

lll/l l l PM WITN ESSES `WCLMMMM 'UNITED sTnTEs PATENT oEEIoE.

ANTONIN BOULADE, OF LYON, FRANCE, ASSIGNOR TO SOCIETE DU CARBURATEUR ZENITH, OF LYON, FRANCE.

PUMP.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed October 19, 1918. Serial No. 258,818.

T0 a-ZZ whom t may Concern Be it known that I, ANTONIN BoULADE, a citizen ot the Republic of France, residing at Lyon, France, have invented a new and useful Improvement in Pumps, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specitication, in which- Figures 1, 2 and 3 are vertical sections of one form of pump embodying my invention and taken, respectively, on the lines I-L H-IL and III-III ot Fig. 4;

Fig. 4 is a plan view with the top cap removed;

F ig. 5 is a vertical section taken on the line V-V of 'Fig 6, and showing a modification;

Fig. 6 is a plan View of the modification;

Figs. 7, 8 and 9 are sectional views of the modification, Fig. 7 being a section on the line VDL-VH of Fig. 5; and Figs. 8 and 9 being sections on the lines VIII-VIII and 'IX- El, respectively, of Fig. 7.

My invention has relation to certain new and useful improvements in pumps, and has been particularly designed to provide a pump which is especially adapted for use in pumping gasolene, the pump being free from any parts which rub against each other in contact with the liquid.

A further object of my invention is to provide a pump of this character, in which the valves are positively actuated in an automatic manner. Other objects and advantages ot my invention will hereinafter appear.

Referring irst to that term ot my invention which is shown in Figs. 1 to 4, inclusive, the numeral 2 designates the pump cylinder having therein a reciprocating piston 3, which receives its movement from a crank 4, on the shaft 5, through the connect ing rod 6. The crank shaft 5 is provided with two cams 7 and 8, one of which is lo cated at each side of the crank 4, and which are arranged to actuate, respectively, the vertically movable pushers 9 and 10. These pushers are mounted in suitable seats in the pump casing, and are arranged to be raised by the cams 7 and 8 against the action of springs 11, which serve to hold the lower ends of the pushers in contact with the cams. The pusher 9 is provided at its upper end with a horizontally extending arm 12, which is connected to an intake valve 13, and the pusher l() at its upper end has a similar arm 14, which is connected to the outlet valve 15. These valves 13 and 15 are provided with seats at 16k and 17, respec tively, and control the inlet port 18 and the outlet port 19.

The numeral 20 designates a chamber intermediate the valve seats 16 and 17, and into and from which the liquid being pumped is drawn and expelled by the action of the piston 3 in the manner hereinafter described.

The numeral 21 designates orifices which are formed through the cylinder wall and which, when the piston is at its lower dead center, establish communication between the interior of the cylinder and the atmosphere.

The cycle of operations of the pump is as follows:

When the `piston 3 moves downwardly from its upper dead center, it creates a vacuum in the chamber 20. The intake valve 13 is then positively opened by the action ot its cam 7, and liquid enters the chamber 2O through the port 18, partly filling said chamber. The outlet valve 15 is at this time closed. The liquid does not completely fill the` chamber 20, because the cubic capacity of the latter is purposely made equal to or larger than the cubic capacity swept by the piston. When the piston reaches its lower dead center, the orifices 21 in the cylinder wall are uncovered and air enters the cylinder, thereby establishing atmospheric pressure in the chamber 20. As the piston starts on its upward movement, outlet` valve 15 is `opened by its cam 8, and the inlet valve is closed. The orifices 21 in the cylinderwall are again closed by the movement of the piston, and the piston compresses the air in kthe cylinder above the piston, this air passing into the chamber 2O by way of the port 20a. The object of this compressed air is to force the liquid in the chamber 2O out through the port 19 together with some air, in such a manner that when the piston reaches the upper dead center, all the liquid has been expelled from said chamber.

It will be observed that there is at all times an air cushion between the liquid and the piston during both the intake andthe exhaust. This cushion of airis below atmospheric pressure during the intake and above atmospheric pressure during the exhaust. .This insures that the charge o liquid will be smaller than the cubic contents of the cylinder swept by the piston and the total amount of this charge Will be exhausted.

Referring now to that form of my invention shown in Figs 5, 6, 7, 8 and 9, the main pump piston 22, Which Works in the cylinder 23, is operated by an eccentric 25 on the pump shaft 5a. This eccentric 25 is placed in an opening in the piston, and the latter is provided with hardened plates 2G, for contact with the eccentric. The aspirating chamber 27 is directly below the piston and communicates directly with the liquid chamber 28. 29 is the gasolene intake which communicates with the chamber 30 and thence to the conduit 3l.

13a designates the intake valve and l5n the outlet valve, these valves being actuated through the push members 9ZL and l0l in substantially the manner already described, by

means of the cams 7a and 8a.

The operation of this form of my invention is as follows: The gasolene or other liquid flows into` the chamber 30 from the inlet 29 and thence through the passage 3l to the intake valve 13 and through the chamber 28. ln this manner, the gasolene instead of coming at once in contact with the intake valve and being stopped by it at the time said valve closes enters the intermediate chamber 30, Where it is met by an interposed air cushion. The interposition of this air cushion results in a large gain in capacity due to a lessening of the inertia effect.

It Will be readily understood that my invention is susceptible of various other mechanical embodiments, that changes may be made as to the particular construction and arrangement of the valves employed and in the means for positively actuating said valves, and that other changes can be made within the spirit and scope of the appended claims.

I claim:

l. A pump comprising an aspirating cylinder having an opening communicating with the atmosphere, a piston in said cylinder and arranged to uncover said opening only at the end of the intake stroke o the piston, a liquid-receiving chamber communicating with the cylinder, inlet and outlet ports leading into and from said chamber, respectively, valves for controlling said ports, and means forV actuating said valves, substantially as described.

2. A pump comprising an aspirating cylinder having an opening communicating with the atmosphere, a piston in said cylinder and arranged to uncover said opening only at the end of the intake stroke of the piston, a liquid-receiving chamber communicating with the cylinder, inlet and outlet ports leading into and from said chamber, respectively, valves for controlling said ports, and means for positively actuating said valves, substantially as described.

8. A pump of: the character described, comprising an aspirating cylinder having an opening communicating With the atmosphere, a piston in ,said cylinder and arranged to uncover said opening only at the end of its intake stroke, a liquid-receiving chamber communicating With the pump chamber and having an inlet port and an outlet port, valves controlling said ports, respectively, a shaft for actuating said piston, and means actuated by said shaft for positively actuating the valves, substantially as described.

a. A pump of the character described, comprising an aspirating cylinder having an opening communicating with the atmosphere, a piston in said cylinder and arranged to uncover said opening at the end of its intake stroke, a liquid-receving chamber communicating with the pump chamber and having an inlet port and an outlet port, valves controlling said ports, respectively, shaft for actuating said piston, and means actuated by said shaft for positively actuating the valves, said means including springpressed pushers engaging the shaft and operatively connected with the valves, substantially as described.

5. A pump comprising an aspirating cylinder hai/ing an opening communicating with the atmosphere, a piston in said cylinder and arranged to uncover said opening only at the end of the intake stroke of the piston, a liquid-receiving chamber communicating with the cylinder, inlet and outlet ports leading into and from said chamber respectively, valves for controlling said ports, and means for actuating said valves, said liquid-receiving chamber being located at one side of the cylinder, substantially as described.

6. A pump comprising an aspirating cylinder having an opening communicating with the atmosphere, a piston in said cylinder` and arranged to uncover said opening at the end of the intake stroke of the piston, a liquid-receiving chamber communicating With the cylinder, inlet and outlet ports leading into and from said chamber, respectively, valves for controlling said ports, and means for actuating said valves, the saidv inlet passage having an intermediate chamber placed in advance of the intake valve and designed to permit the liquid being pumped to accumulate therein after the intake valve is closed, substantially as described.

7. In a pump of the character described, in which the pump piston acts during its intake stroke to draw liquid into a separate receiving chamber, and upon its return for stroke to force compressed air into said chamber to expel the liquid therefrom, a liquid inlet passage for said chamber, a valve in said passage, and a reservoir in front of the valve, substantially as described.

8. A pump of the character described, comprising an aspirating cylinder, a piston in said cylinder, a liquid receiving chamber lcommunicating with the pump cylinder and having an inlet port and an outlet port, valves controlling said ports, respectively, a shaft for actuating said piston, and means actuated by said shaft for positively actuating the valves, said means including spring pressed pushers engaging the shaft and operatively connected with the valves, substantially as described.

9. A pump of the character described, comprising an aspirating cylinder, a piston in said cylinder, a liquid receiving .chamber communicating with said cylinder and having an inlet port and an outlet port, valves controlling said ports, respectively, a shaft actuating said piston and spring pressed pushers operated by said shaft for actuating said valves, said piston and pushers being out of contact with the liquid being pumped, substantially as described.

10. A pump of the character' described, comprising an aspirating cylinder, a piston in said cylinder, a liquid receiving chamber communicating With the cylinder, means for automatically admitting air to said chamber" at the end of each intake stroke of the pisll. A pump of the character described, if

comprising an aspirating cylinder, a piston in said cylinder, a liquid receiving chamber communicating with the cylinder,means for automatically admitting air to said chamber at the end of each intake stroke of the piston, said chamber having inlet and outlet ports, valves controlling said ports, and means for positively actuating said piston and said valves, said piston and valve operating means being out of contact With the c liquid being pumped, substantially as described.

12. In a pump of the character described in which the pump piston acts during its intake stroke to draw liquid into a separate receiving chamber, and upon its return stroke to force compressed air into said chamber to expel the liquidtherefrom, means for automatically admitting air to said chamber at the end of each intake stroke of the pump piston, a liquid inlet passage for said chamber, a valve in said passage, and a reservoir in front of the valve, substantially as described.

In testimony whereof, I have hereunto set my hand.

ANTONI'N BOULADE. Witnesses:

MARIN VAoHoN, Louis Esci-Inn. 

